In the latest contest, not only did Linux dominate, but Linux showed that is slowly pushing out all its competitors. In the June 2014 Top 500 supercomputer list, the top open-source operating system set a new high with 485 systems out of the fastest 500 running Linux. In other words 97 percent of the fastest computers in the world are based on Linux.
With numbers like this, it's easy to forget that this project started with the words "just a hobby, won't be big and professional like gnu".
This hobby now dominates almost every field of computing - from mobile to supercomputing.